diff --git a/mingw-w64-crt/Makefile.am b/mingw-w64-crt/Makefile.am
index 9f845b3..a6903b6 100644
--- a/mingw-w64-crt/Makefile.am
+++ b/mingw-w64-crt/Makefile.am
@@ -2273,6 +2273,7 @@
 		%/libapi-ms-win-core-shutdown-l1-1-0.a \
 		%/libapi-ms-win-core-shutdown-l1-1-1.a \
 		%/libapi-ms-win-core-sidebyside-ansi-l1-1-0.a \
+		%/libapi-ms-win-core-sidebyside-l1-1-0.a \
 		%/libapi-ms-win-core-string-l1-1-0.a \
 		%/libapi-ms-win-core-string-l2-1-0.a \
 		%/libapi-ms-win-core-string-l2-1-1.a \
diff --git a/mingw-w64-crt/lib-common/api-ms-win-core-sidebyside-l1-1-0.def b/mingw-w64-crt/lib-common/api-ms-win-core-sidebyside-l1-1-0.def
new file mode 100644
index 0000000..b7b4933
--- /dev/null
+++ b/mingw-w64-crt/lib-common/api-ms-win-core-sidebyside-l1-1-0.def
@@ -0,0 +1,15 @@
+LIBRARY api-ms-win-core-sidebyside-l1-1-0
+
+EXPORTS
+
+ActivateActCtx
+AddRefActCtx
+CreateActCtxW
+DeactivateActCtx
+FindActCtxSectionGuid
+FindActCtxSectionStringW
+GetCurrentActCtx
+QueryActCtxSettingsW
+QueryActCtxW
+ReleaseActCtx
+ZombifyActCtx
diff --git a/mingw-w64-crt/lib-common/onecore_apiset.mri b/mingw-w64-crt/lib-common/onecore_apiset.mri
index 9418edd..964d5c8 100644
--- a/mingw-w64-crt/lib-common/onecore_apiset.mri
+++ b/mingw-w64-crt/lib-common/onecore_apiset.mri
@@ -133,7 +133,7 @@
 ADDLIB libapi-ms-win-core-shutdown-l1-1-0.a
 ADDLIB libapi-ms-win-core-shutdown-l1-1-1.a
 ADDLIB libapi-ms-win-core-sidebyside-ansi-l1-1-0.a
-; FIXME libapi-ms-win-core-sidebyside-l1-1-0.a
+ADDLIB libapi-ms-win-core-sidebyside-l1-1-0.a
 ; FIXME libapi-ms-win-core-state-helpers-l1-1-0.a
 ADDLIB libapi-ms-win-core-string-l1-1-0.a
 ADDLIB libapi-ms-win-core-string-l2-1-0.a
diff --git a/mingw-w64-crt/lib32/api-ms-win-core-sidebyside-l1-1-0.def b/mingw-w64-crt/lib32/api-ms-win-core-sidebyside-l1-1-0.def
new file mode 100644
index 0000000..1bc2895
--- /dev/null
+++ b/mingw-w64-crt/lib32/api-ms-win-core-sidebyside-l1-1-0.def
@@ -0,0 +1,15 @@
+LIBRARY api-ms-win-core-sidebyside-l1-1-0
+
+EXPORTS
+
+ActivateActCtx@8
+AddRefActCtx@4
+CreateActCtxW@4
+DeactivateActCtx@8
+FindActCtxSectionGuid@20
+FindActCtxSectionStringW@20
+GetCurrentActCtx@4
+QueryActCtxSettingsW@28
+QueryActCtxW@28
+ReleaseActCtx@4
+ZombifyActCtx@4